Steam-boiler



J. P. SIMMONS.

(No Model.)

STEAM BOILER.

Patented Mar. 8,1898.

JPSirnmons Nrrnn STATES JOHN P. SIMMONS, OF SAN FRANCISCO, CALIFORNIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 600,296, dated March 8, 1898.

A li ation fil d June 10, 1897. Serial No. 640,249. (No model.)

To all whom it may concern: i

Be it known that I, JOHN P. SIMMONS, a citizen of the United States, residing at San Francisco,in the county of San Francisco and State of California, have invented certain new and useful Improvements in Steam-Boilers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has relation to steam-boilers and the object is to provide a combined water and fire tube boiler with a large exposed heating-surface in a compact form and to effect the water circulation within the boiler.

With this object in View the invention consists in certain features of construction and combination of parts, which will be hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a front view of my improved boiler, a section of the face of the furnace being removed to more clearly illustrate certain parts; and Fig. 2 is a side View with the side wall of the furnace removed and showing the parts constituting the boiler partly broken away.

In said drawings, A denotes a cylindrical drum provided with the ordinary fire-tube a. This drum is suitably mounted and supported in the brickwork of a furnace and provided with an uptake or smoke-flue 1. At one end of the drum A is provided a water-leg B, which is in free communication with the drum A and has in its sides a plurality of registering openings 2, those in the front plate being adapted to be closed by removable plates 3, while those in the rear plate are adapted to receive the forward ends of the inclined watertubes E.

C denotes an elbow which extends from the rear end of the drum A to and communicates with a receiving-chamber D, to which the rear ends of the water-tubes E are attached. This construction permits of a continuous waterway or circulation from the drum A, through the elbow C, to the receiving-chamber D, tubes E, water-leg B, and back to drum A, which is kept up by the heat under the boiler traveling in opposite directions, as indicated by the arrows.

3 denotes the furnace-grate, 4 the bridgewall, and 5 a deflecting-plate secured underneath the drum A and projecting downwardly below the upper row of water-tubes E, immediately in advance of the elbow C, sothat the heat and products of combustion are caused to rise from the grate up around the bank of tubes E, thence downwardly around them again and around the deflector, and thence upwardly again through the fire-tubes into the uptake or smoke-flue.

If desired, I may provide two supplemental or auxiliary flues 6, which are formed of brick and are above the upper series of fire-tubes in the drum A, but below the water-line in said drum, and are provided with dampers 7. These tubes communicate with the space at the rear of the drum A and with the uptake, and by adjusting the dampers the smoke and products of combustion may partly pass through said flues and through the tubes within the drumA, or all the products of combustion and smoke may be caused to pass through the tubes in the drum A by closing the dampers in the auxiliary or supplemental flues.

A boiler thus constructed is simple, composed of but few parts, and occupies but a small space, while at the same time securing a maximum amount of heating-surface and water-circulating space.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 'is- The combination with the drum provided with fire-tubes,of Water-tubes arranged below the drum, a water-leg communicating with the forward end of the drum and connected to said water-tubes, a receiving-chamber connected to the other end of said Water-tubes, an elbow connecting the rear end of said drum with the receiving-chamber, a fire-chamber and bridge-wall, a deflector projecting downwardly from the drum immediately in advance of the elbow, and supplemental firetubes arranged on the exterior of the drum and communicating with the space in the furnace at the rear end of said drum and with an uptake or chimney at the front end of the drum, substantially as set forth.

In testimony whereof I hereunto affix my signature in presence of two witnesses.

JOHN P. SIMMONS.

Witnesses:

LINCOLN SoNNrAe, W. A. J ONES. 

